Abstract

We present an Abel-inversion algorithm to reconstruct mean and rms refractive-index profiles from spatially resolved statistical measurements of the beam-deflection angle in time-dependent, axisymmetric flows. An oscillating gas-jet diffusion flame was investigated as a test case for applying the algorithm. Experimental data were obtained across the whole field by a rainbow schlieren apparatus. Results show that simultaneous multipoint measurements are necessary to reconstruct the rms refractive index accurately.

© 1999 Optical Society of America

Three-dimensional rainbow schlieren tomography of a temperature field in gas flows

Ajay K. Agrawal, Nelson K. Butuk, Subramanyam R. Gollahalli, and DeVon Griffin
Appl. Opt. 37(3) 479-485 (1998)

Abel inversion of deflectometric data: comparison of accuracy and noise propagation of existing techniques

Pankaj S. Kolhe and Ajay K. Agrawal
Appl. Opt. 48(20) 3894-3902 (2009)

Schlieren-based temperature measurement inside the cylinder of an optical spark ignition and homogeneous charge compression ignition engine

Pavlos Aleiferis, Alexandros Charalambides, Yannis Hardalupas, Nikolaos Soulopoulos, A. M. K. P. Taylor, and Yunichi Urata
Appl. Opt. 54(14) 4566-4579 (2015)

Quantitative rainbow schlieren deflectometry as a temperature diagnostic for nonsooting spherical flames

Douglas A. Feikema
Appl. Opt. 45(20) 4826-4832 (2006)

Temperature measurements in steady axisymmetric partially premixed flames by use of rainbow schlieren deflectometry

Xudong Xiao, Ishwar K. Puri, and Ajay K. Agrawal
Appl. Opt. 41(10) 1922-1928 (2002)